What goes in the blank

vicky does her homework carefully and efficiently or carefully and in an efficient manner or with care and efficiently

dereck for his band is playing bass and sings backup or plays bass and sings backup or plays bass and singing backup

1) carefully and efficiently, and 2) plays bass and sings backup for his band.

Explanation:

type of error:

the error in the sentence is a "dangling modifier". a dangling modifier is a phrase, word or clause that "dangles" because there is not target to modify. in this case, "after mopping the floor" is the dangling modifier since it has no word to modify. the noun "house" cannot mop the floor; therefore there is a mistake in the writing of the sentence.

the anwser is c i just took the test